In are welding D.C. reverse polarity is used to bear greater advantage

1.	In are welding D.C. reverse polarity is used to bear greater advantage in:
A.	Overhead welding
B.	Flat welding of lap joints
C.	an isolated system
D.	Flat welding of butt joints
Answer» C. an isolated system

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In are welding D.C. reverse polarity is used to bear greater advantage in:

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